Abstract: The metallurgy effect of carburized bearing steel G20CrNi2MoA for railway (/% ： 0, 19C, 0. 49Cr, 1.75Ni, 0. 23Mo, 0. 071 Al) by argon shielding atmosphere electroslag remelting ( ESR) in closed hood and by normal atmospheric ESR has been tested and analyzed. Results show that the loss of Si and Mn of argon shield atmosphere ESR ingot (3% 〜12% and 4% - 10% ) is less than the loss of Si and Mn of normal atmospheric ESR ingot (15% ~ 18% and 7% ~ 10% ) ； as the oxygen content in electrode of steel G20CrNi2MoA is 10 x 10^-6, the oxygen content in argon shield atmosphere ESR ingot (15 x 10^-6) is lower than that in normal atmospheric ESR ingot (21.3 x 10^-6 ) ； and the metallurgical quality of argon shield atmosphere ESR ingot is obviously better than that of normal non gas shielding ESR ingot.

摘要： 试验和分析了全封闭气罩氩气保护电渣重熔与常规大气下电渣重熔铁路用G20CrNi2MoA渗碳轴承钢(/%:0.19C、0.49Cr、1.75Ni、0.23Mo、0.071Al)的冶金效果。结果表明,氩气保护电渣重熔锭Si和Mn的烧损量(3%～12%和4%～10%)低于常规电渣重熔锭Si和Mn的烧损量(15%～18%和7%～10%);当G20CrNi2MoA钢电极的氧含量为10×10^-6时,氩气保护电渣锭的氧含量(15×10^-6)低于常规电渣锭的氧含量(21.3×10^-6);氩气保护电渣锭的冶金质量明显优于未经气体保护的常规电渣锭。

关键词: 惰性气体保护电渣炉, 渗碳轴承钢G20CrNi2MoA, 氧含量, 非金属夹杂